Last month, Slater said he was holding out hope that the first Olympic surfing competition in Tokyo in 2020 would use wave-pool technology rather than the already decided freshwater venue in Japan, which obviously comes with the typical variables of surfing contests.

Slater, 46, may even try and make the first U.S. Olympic surfing team.

White, who was at the last two Summer Olympics as a spectator and correspondent for NBC, may try to make the 2020 Games in skateboarding, another new Olympic sport.

Hawk, 50, is not expected to attempt a comeback from a near-two-decade retirement.

More: Olympics

NEW YORK — On consecutive days, the most well-known surfers in the U.S. appeared at the Tribeca Film Festival to promote documentaries of a sport that makes its Olympic debut at Tokyo 2020.

Whether either Kelly Slater or Bethany Hamilton plans to compete at the Games is in question.

“I’m 50-50,” the 46-year-old Slater said Saturday at the premiere of “Momentum Generation,” a film about a band of teen surfers whose bonds brought the sport to new heights in the 1990s. “If I make the team, I’ll compete.”

That’s the hard part. The Olympic qualifying procedures, published last month, limit the U.S. to no more than three surfers per gender in the Olympic fields of 20 men and 20 women.

The top two Americans per gender from the 2019 World Surf League standings would be guaranteed spots. If the world’s dominant surf nations take up the top 34 spots in either 2019 standings, the third-ranked U.S. surfer could get in if the U.S. wins the 2020 World Surfing Games.

“They’re going to have to change that a little bit, I think,” Slater said of the quota maximum (It’s too late to change this for 2020, and surfing is not guaranteed in the Olympics for 2024 and beyond.). “It’s hard to look past Brazil, Australia and America for talent in surfing.”

Slater, an 11-time world champion, dropped to the third-ranked American in 2016 and missed four of 11 events last season after breaking his foot. His best finish in the other seven events was a fifth. He hopes to return to competition in July, about a year since suffering the injury that required two surgeries.

The U.S. boasts the two-time reigning world champion — 25-year-old John John Florence of Hawaii — but no other men from last season’s top six or this season’s (early) top seven.

Slater said he hopes that Olympic surfing organizers would adopt his company’s wave-pool technology for the Games rather than holding it on the Pacific Coast. It was previously announced by the International Olympic Committee and Tokyo 2020 that the Olympic competition will be held at Tsurigasaki Beach rather than a wave pool.

“It’s almost a test sport for the first year when you get into the Olympics,” Slater said. “I think it will obviously broaden the audience that watches us. There’s a lot of potential things that can happen with that.”

Slater was one of several surfing icons featured in “Momentum Generation,” along with Rob Machado, Shane Dorian and others.

“[It’s about] the convergence of all our friendships coming together,” said Slater, before he watched the film for the first time at the premiere. “Everyone’s got these kinds of stories in their lives that are interesting. Somebody found ours interesting enough to cover it, dig in and spend a lot of time on it.”

The night before, Hamilton walked the red carpet for her biopic, “Bethany Hamilton: Unstoppable.” The Hawaiian’s left arm was bitten off in a 2003 shark attack when she was a promising 13-year-old surfer. She came back and continued winning contests.

“We started making a smaller, action sports compilation of my surfing,” five years ago, Hamilton said. “It grew into a more story/documentary.”

Hamilton, now 28 and a mother of two, last competed in the top-level World Surf League last May before she became pregnant with her second child, son Wesley, who was born six weeks ago.

She, too, was undecided about ramping up her schedule next year for an Olympic bid.

“I don’t know if I could qualify, but I’m not really competing enough to be the top-two pick of the USA team,” she said, adding that the type of wave at the Olympics plays a role in her interest.

Hamilton, between those two pregnancies, competed four times total on tour in the last four seasons with a best finish of third. Last season, four U.S. women were in the top eight of the World Surf League standings. Hamilton was tied for 20th with one start in 11 events.

Hamilton said she hopes to compete at least twice later this year, including at a Slater wave-pool event.

Phelps was partnered with surfer Kelly Slater. The pair defeated former sprinter John Regis and former tennis player Martina Navratilova, as the U.S. celebrities dominated the Europeans 14-0 over a 9-hole scramble at the Hazeltine National Golf Club in Minnesota.

Phelps appeared to have fun with the crowd, telling fans that he planned on using one of his 23 Olympic gold medals as a ball marker. He also heard “2020” chants from fans who want him to compete at the Tokyo Games.

“That was pretty funny, because it’s not happening,” Phelps said to RyderCup.com.